Philips User Processors MAB8441P (MAB 8441P, MAB8441) Data for Txxx Programming Code
In Philips vintage cd player models (so as in high grade brands like e. g. Krell, SAE, Proceed, Mark Levinson, Micromega) there are a often the MAB8441P in use but with a wide range of different programming codes.
The following versions of MAB8441P are very common:
T082 and T012.
But also I have found this versions:
Probably there are many more.
But the associated datas so as information about compatibility I don't find on the web.
Please let me know, from where I can get this information ?
Follow threads don't provide the wanted informations:
Old Philips DAC module - info. required.
Help me I need MAB8441PT164 DataSheets
Help me I need MAB8441 PCF3523 PCF2705 DataSheets
Thanks for advices.
I have heard, that the German company ASWO had a CD-ROM, where a reverse search was also possible.
I. e. from part naming to the brand/model.
Who know the old order code of this ASWO cd rom ?
any news ?
This is a mask-programmable ROM controller. According to the datasheet (attached) the ROM is programmed in the factory. This is the version code you encounter. It is unique for a specific function. I am not aware of any lookup table/information source for these versions. I ran into this myself while repairing a Cyrus AM/FM tuner. I ended up writing my own firmware...
These controllers were available as spare parts from (apparently also) ASWO and others. They also rarely fail, usually they get locked up in some unexpected mode due to an unhandled/unforeseen combination of inputs or other bugs. As for spares, if they are indeed faulty you're dependant on old stock. I got lucky with a failed NEC controller in a Technics amp. A NOS one from an obscure source solved the issues completely.
You could have a go at MFBFreaks forum as there is a lot of Philips-specific information around.
MAB microcontroller versie overzicht - MFBfreaks.com
The efforts are only for the aim to find replacement devices in used condition to get the same device for the case, when it is necessary.
In the moment I need for Micromega top-loaders replacement cheap cd player models. In use are the follow:
Micromega SOLO mit CDM1-MKII/CDM4/25:
1) MAB 8441P T018 (Operating Unit/front PCB)
2) MAB 8441P T164 (Servoprozessor board)
Micromega DUO mit CDM9-pro:
1) MAB 8441P T018 (Operating board/front PCB)
2) MAB 8441P T162 (Servoprocessor)
Other devices with this versions:
NSM PickUp Driver Board:
1) MAB 8441P T018 (operating section)
2) MAB 8441P T164 (servo units TDA5708/TDA5709)
MAB 8441P T164
B&O Beocenter 8000 9000 9300 8500 9500 CD control board:
MAB 8441P T164 - go to one of the pictures under
CD Control Board for Beocenter 9500
GRUNDIG CD 35 (not CD-35X):
2xTDA1540P – SAA7030 CDM-2/10 MAB8441P-T018
Concerning this the MAB versions T162/T164 are not in use in single cd player models with loader/tray - this means only hifi consoles, music centers, hifi systems and ghetto-blasters equipped with CDM1-CDM9 (maybe with front loader but without loader with tray) uses this programmable version.
Where is such an overview/model list in the kind of those from the URL as follow ?
How did you go tiefbassuebertr ?
Any news from Dutch Audio Classics people?
I am working on this Cambridge Audio which has two of them, T065 and T082 variety and they might be cooked. I wanted to get some just in case without realising that they are programmable...
Please keep us updated.
Mask programming is a production special and cannot be programmed later
That was the reason to start this thread.
Has anyone been able to find more on the Txxx program versions and possible backward/forward compatibility? A friend of mine and I have an PHILIPS CD304 (MK I) that needs the IC replacement; funny thing - on the board is the MAB8441P-T016, while the service manual states that MAB8440P-D060 is used (!)
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